Fitting for electrical conduit systems



March 22, J G 'FULLMAN 1,850,794

FITTING FOR ELECTRICAL CONDUIT SYSTEMS Original Filed May 15,1929

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Patented Mar. 22, 1932 UNITED STATES PATENT OFFICE JAMES M. G. FULLMAN,OF SEWICKLEY, PENNSYLVANIA, ASSIGNOR TO NATIONAL ELECTRIC PRODUCTSCORPORATION, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE FITTING FORELECTRICAL CONDUIT SYSTEMS Original application filed May 15, 1929,Serial No. 363,121.

Divided and this application filed February 17, 1930.

This invention relates to fittings for duct systems and moreparticularly relates to fittings adapted for use with an underfloor ductsystem which is generally of the type shown and described in theco-pending application of IV. C. Robinson, Serial No. 338,667, filedFebruary 9, 1929. The present application constitutes a division of myco-pending application Serial No. 363,121, filed May 15, 1929.

In the installations of so-called underfloor duct systems it is thepractice to first lay the main fioor slab or base and then to installthereon the duct system for electrical distribution. The ducts arespaced slightly from and levelled with respect to the main slab andsubsequently the ducts are covered with concrete. Frequently one ductmust be connected with another and in some cases blind ends of ductsmust be sealed OE and in other cases elbow connections must be made fromducts running in one direction to other ducts which run at right anglesthereto. Sometimes the disposition of the ducts is such that certainduct runs must cross other ducts.

One object of the present invention resides in the provision of a blindend closure which is provided with means of novel form for fastening anadjacent duct section thereto.

Another object of the present invention resides in the provision of ablind end of a closure with means for supporting said closure at anadjustable height above the main floor slab.

Further and other objects of the invention will be hereinafter set forthin the accompanying specification and claims and shown in the drawingswhich by Way of illustration shows a preferred embodiment of theinvention.

In the drawings:

Figure 1 is a plan view of a fragment of a duct system employing anumber of fittings and in which there is provided a blind end closurefor blanking off one end of the duct system; and

Fig. 2 is a detail sectional view of the blind end closure or cap takenon lines 2-2 of Fig. 1.

In more detail referring to the drawings, represents a section ofunderfloor duct or Patent No. 1,782,779, dated November 25, 1930.

Serial No. 428,880.

conduit provided with integral outlet necks 11. This duct or conduit isshown having at its right hand end a fitting 13 having a female couplingat one end to receive the duct 10 and a coupling on the opposite end toreceive conduit section 17a. Duct 10 and section 17a are secured to theconnector fitting 13 by means of the set screw 14. The section 17a is anelbow section having its elbow in the plan-e of the conduit 10. Theconduit 10 is shown as having its end opposite from 1764 sealed ofi by aso-called duct end blanking part 24 or blind end closure. Such duct endblanking part 24 includes a female coupling portion 24a and is providedwith set screws 14 which engage the duct 10. The part 24 is alsoprovided with an extension 15 adapted to receive a stud 16. By adjustingthe stud up and down the blind end closure can be adjusted to anydesired height above the supporting floor slab 12. In this way theassociated duct system at its end adjacent the blind end closure can beadjusted to the desired height above the main supporting floor slab.

lVhat I claim is:

1. A fitting for a conduit system comprising a part adapted to be fittedto and for blanking off the end of a conduit, said part also having anextension receiving a threaded stud which provides for supporting thepart and the conduit which is blanked off thereby at a desired variedheight from a supporting floor slab.

2. A fitting for a conduit system comprising a part adapted to be fittedto and for blanking off the end of a conduit, said part having athreaded stud which provides for supporting the part and the conduitwhich is blanked 01f thereby at adesired varied height.

In testimony whereof I hereto afiix my signature.

JAMES M. G. FULLMAN.

